151Eu-Europium
151Eu has 63 protons and 88 neutrons.
151Eu is a stable isotope.
The mass excess of 151Eu is -74653.098 with an uncertainty of ±1.166.
The mass was measured using Nuclear Physics and the related equations include:
Influence Equations
57.7% 151Sm(β-)151Eu 1
40.5% 151Eu(n, γ)152Eu 2
0.7% 151Gd(ε)151Eu 3
Reference
1. W.T. Achor, W.E. Phillips, J.I. Hopkins, S.K. Haynes (1959) Low-Intensity Conversion Lines from 151Sm and 113Sn
Physical Review 114(1)
https://journals.aps.org/pr/abstract/10.1103/PhysRev.114.137
2. T. von Egidy, H.G. Borner, F. Hoyler (1985) Cross sections and γ-rays from multiple neutron capture in 151Eu
Zeitschrift fur Physik A 322(669-675)
https://link.springer.com/article/10.1007/BF01415150
3. E. Voth, W.D. Schmidt-Ott, H. Behrens (1983) Atomic masses of rare earth isotopes 145Pm, 145Sm, and 151Gd,
derived from decay measurements of 145Sm and 151Gd Zeitschrift fur Physik 313(167-172)
https://link.springer.com/article/10.1007/BF01417224